Wood-bending machine



, 2 SHEETS-SHEET l.

PatentedSept, 26, 1922.-

L. P. MALIN. W000 BENDING MACHINE.

I APPLICATION FILED SEPT. 20, I92]. 1,430,244.

WZML L- P. MALIN.

WOOD BENDLNGv MACHINE.

I APPLICATION flLED SEPT- 20, 1,921- 7 1,430,244. at nt d Sept- 26, 1922.

2 SHEETS-SHEET 2.

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; 1,430,244 PATENT OFFICE.

LEWIS PRESTON MALIN, OF LONG BEACH, CALIFORNIA.

WOOD-BENDING MACHINE.

Application filed September 20, 1921. Serial No. 502,009.

To all to 7mm it may con-cam:

Be it known that 1, Lnwrs MALIN, a citizen of the United States, residingkit Long Beach, in the county of Los Angeles and State of California, have invented a new and useful \VoodBending Machine,of

which the following is a specification.

This invention has reference to the manufacture of extension tables and 1s particularly designed for bending the half. circle rims that constitute parts of such tables, and

primarily my said invention has for its object to provide a machine for the purpose stated of a relatively simple and economical construction, that comprises first, an ,improved means for feeding the glued wooden core or material to a steel framing'or former and for turning the said framing as the said wooden core or material is being bent thereon, and further means for hold'ng the said wooden core, when bent to a rim shape, in a clamped condition.

In its more complete nature, my invention includes an improi 'ed means for first tightly bending the core and veneer around the forming frame and devices for securing the said means whereby the said bent wooden core or rim s etained in its clamped position, during the setting of such rim to its bent shape.

In its subordinate features, my invention embodies certain details of construction and novel combination of parts, all of which will be fully set out in the following description, specifically pointed out in the appended claims and illustrated in the accompanying r ll-'awings, in which:

Figure 1 is a front elevation of my wood bending machine, the combined bending and clamping band and the forming or shaping frame mechanism being at a position ready for receiving the wooden core and veneer that is to be bent into shape.

I Figure 2 s an end elevation of the base and upright fran1ing,'the bending inechanism and its vertically shiftable supporting frame being omitted, the power transmission and bending member guide roller being shown in operat ve relation.

1* igure 3 is a front elevation of the forming frame and the cooperating means for first bending the wooden core to a rim shape and for securing it onto the forming frame when it is bent.

Figure 4 is a detail cross section of rim of the forming frame.

the

Figure 5 is an enlarged side elevation, parts being in section of the metal devices that constitute a part of the forming frame and which are especially adapted for gripping the infed end of the wooden core or body. I v

Figure 6 is a detail view of the hook device on the outer end of the bendingband hereinafter referred to.

Figure 7 is a detail side view of one of the steel stud bolts attached to the main drive wheel to which the forming frame is clamped. I

Figure Sis a detail View of the cam lever with which the hook on the bending band uprights or legs 10-l0, in practice about two feet high, and connected by cross beams 11 and 12 and upon which is supported a table top 13. 1

2-2 designate two upright posts bolted at their lower endsto the cross beams x 12 and they pass through openings in the table top 13, as shown. I

Theposts 2-2 are vertically grooved as at 20 -20 to constitute guides for the side flanges or tennons 30 of a supplemental frame which includes opposite uprights 3-3 on which the tennons 30 are formed and which are connected at their top andbottom by cross members.3131 and amidway horizontal beam32 which latter con-v stitutes the supporting element that sustains the forming frame devices over which the wood core is bent, as will be presently fully explained.

The supplemental frame, hereinafter termed the lifting frame," is vertically movable along the posts2-2 for a quick adjustment of the different s'tzes of the steel forming frames, and to that end one of the uprights 3 has a series of vertically elongated apertures 33 for receiving a lock pin 3d that fits through one of the side posts 2 and is adapted, for engaging with a. desired one of the apertures 33, the vertical elongation of the said apertures permitting suflicient play to allow the forming frame to rest on a flanged roller 4 that is journaled in thetable top with its upper edge 4O flush withthe said table top, as is clearly shown in Figure 2.

The upright 3 that has the elongated apertures 33 is also provided with stud pins 34 for cooperating with a lifting lever 5 that is fulcrumed on the front face of the adj acent side posts (see Figure it being understood that when the lever is positioned, as in Figure 1, by removing the lock pin 4, the vertically movable lifter frame can be adjusted, as desired.

As before noted, the midway cross beam 32 of the lifter frame constitutes the sup porting element upon which the wood shaping or forming mechanism is sustained, and at this point it should be mentioned the said mechanism includes a forming or shaping means adapted for being detachably mounted, in relation to the permanently mounted.

power transmission mechanism, the latter, and the forming rim, having interengaging means whereby the said transmission mechanism is adapted for sustaining forming or shaping frames of different sizes, as will presently more fully appear.

Referring now more particularly to Fig ures 1 and 2. of the drawings, it will be observed a crank shaft 6 is journaled in a suitable b'earing on the bottom cross member 32 of the lifter frame whose outer end carries a cog; pinion 7. The pinion 7 meshes with, a main cog tansmission wheel 14 that is fixedly mounted on the reduced or flanged end 80 of a shaft 8 that is journaled in a sleeve bearing 81 on the cross member 32.

The said main or transmission wheel 14 has a series of stud bolts 15 projected from its outer face, each of which has an annularly grooved head 15 that latches the steel metal forming frame onto the wheel 14 to turn therewith, as presently further ex? plained.

The forming mechanism comprises a steel frame that is composed of a semi-circular member 16, T shaped in cross section, and a,

. side of the cross member 18, centrally thereon, which brackets provide a central bearmg for pivotally and loosely mounting the forming frame on the outer projected end ment for securing the forming frame onto the main cog wheel 14 to rotate therewith in the direction indicated, by the arrow on Figure 1,. the said bifurcated lugs engaging the annular heads of the stud projected from the said wheel, as shown.

The means for connecting the forming frame to the wheel are such that one frame may be readily removed from the wheel 14 to be replaced by a forming frame of another size, as desired, it being understood the forming frames are not fixedly attached to the wheel 14 but are merely mounted thereon to turn therewith, as stated.

At one side of the main table is hingedl'y connected a long supplemental table or platform 23, the outer end' of which is supported by a leg 23*, when the said supplemental table is swung down to the operative position shown in Figure 1. By hinging the supplemental table portion, as stated and. shown, it may be readily swung'up out of way when the machine is not in use and against the adjacent upright post 2', as shown in dotted lines in Figure 1.

24 designates a strap iron band, which is hereinafter termed the bending and clamping element, one end of which is adjustably secured to one edge of the forming wheel, the adjustment thereof providing for lengthening or shortening the band for the different diameters or sizes of the forming frame. The band 24, when at the extended position, lies flatwise on the table 23 and its outer end is provided with a malleable iron eye hook 24 (see Figures 1 and 6) that is engaged by a cam lever 51 that is located at the edge of the forming frame opposite the edge to which the band is adjustably joined.

At the edge of the forming, frame, where the infed end of the core to be bent is received, is an attached clamping means for firmly gripping the said end of the coreand securing it as the remainder is bent over the forming frame and clamped at the other end thereof in the manner best shown in F igure-3.. The aforesaid mentioned clamping means comprises a bracket iron 35 that is held on the under side of the cross member 18 of the forming. framebyi a bolt 36 which passesthrough the flange of the said member 18, and through a longitudinal slot 37 in the iron 35,v as isbest shown in Fig,- ure 5,.which illustrates a simple and effective means for adjusting the iron radially with respect to the fulcrum of the formingframe, whereby to determine the length of the bending band to suit the special'sizes of the forming frame used.

The adjusting means stated consists of an angle bracket 38 which is attached. to the underside of the cross member. 18, and an adjusting screw 39 that is mounted in the bracket 38 and engages with a threaded iso The gripping member consists of. alseg mental shaped iron 41 that is provided along its under face with ratchet-like teeth ed for interengaglng the ratchet teeth 35 on v the iron 35.

The iron 11 is of surlicient'length to normally project beyond the edge of the ior1ning' frame over which the innermostend of the wooden core is fed when placed in position for being bet to form a table frame piece, and the outer end of the said iron 41 has a transverse row of sharp teeth 41 in practice one-eighth of an inch long, which areforced into the said core ends as the processor bending the core begins.

To provide attachment of the iron 41-1 along the iron 85 the innerend of the said iron ll has an elongated slot 4-1 for the passage of the screw shank of a bolt 12 that is attached to the iron 35iand which receives a clamping nut 42*, as shown. I

The forward end of the bending band extends over and is riveted to the iron. ll, shown. 1

Operation. I

The parts being constructed in the manner so far described and shown, and assuming the forming frame and the bending band to be in the position shown ini igure 1, the parts are now ready for receiving the wooden core to be bent, which'is laid flatwise onto the bending band with its "forward end projected between thenow bottom'e or the forming frame and the grippin c r ment attached to such end of the frame, as indicated on l igure v1. 7 Power being now applied to the shaft to turn the main wheel in the direction of the arrow :0, the forming frame rotates with the said wheel and carries the bending band with the wooden core thereon with it, un

'der the continuously changing bottom part of the forming rim of the frame, until the other edge of the said frame reaches 113 bottom position, that is, when'the full length of the band, with the wooden core has been bent over the torming frame, shown in Figure 3.

hen the core and the band are fully bent onto the forming frame, as stated, a cam lever 51 pivoted to that edge of the forming frame opposite the core receiving 1 frame i litting frame for holding tively to the table, form it to travel around n edge, is drawn through the slotted hoot; theend oi the band and bent baclrto the position shown in full lines on Figure and thereby secures the band with the core in the bent over position, the band 110v holding the said core until it is set to its bentshape, alter whicheby simply turning the cam lever baclr to disengaging the hook PA on the band, the latter can be conveniently drawn back to its flat position, it be uidcd by the fiance wheel 1, as it is .us drawn baclrand the wheel 8 with the frame re'versely rotated back to the position shown in nignre 1, I

v l Vhile l have described my mechanism as adapted for'being worked with hand crank power, it is obvious that the power may be a motor controlled transmission with the motor mounted on the lifter frame to move up and down with it, the said motor being switeh-controlled, as is usual in power generating mechanism of the hind stated. 4

While the details of construction shown and described disclose practical development of my invention, it is to be understood vthat the said details 'may be, varied and includes a table, a pair or" rigid uprights that e:

d through the iiclbi, a lifting o ally along the uprights, and means to sting with the he said lifting ijustments rein-- frame having a semi-circular rim, said torming it ie being jour lllQCl on the lifting framewith i rim "faeeopposi the table, bending l adapted to lie flatwise onthe pass between the table andv tl frame to different vertical tor-mine" frame, means on the forward end mi circular rim for clamping the iorward c =d oi the Den 1 o oand 1 L0 cause 1 the rim of the forming frame, the said and and (the tori ing framerim constituti the seat 1 .017111 eeiving the forward end o.=. the wooden core to be bent,fthe said means for clinnping the band comprising a segment on a f r i frame, a segment on th band r connect ing with the other segment, and means for holding the two segments interlocked.

2. Ina machine for bending half circular frames for extension tables, a table, a sup- -iortin frame that iroiects verticall T from the table, a guide roller on the table top,

a forming frame ha *ing a semi-circular rim,

the said m being journalled on the vertical supporting frame with its rim face opposing the guide roller, a bending band adapted to rest flatwise on the table and to pass between the guide roller and the rim of the forming frame, one end of the said band being fast to one edge of the forming frame and which constitutes with the said frame a seat for receiving the forward end of the wooden body or core to be bent, a clamp device on the aforesaid edge of the forming frame adapted to grip the said wooden body and pull it with the board between the frame rim and the table guide and around the forming frame rim as the said frame is rofated, means on the other edge of the forming frame for clamping the outer end of the band whereby to hold it and thewooden core to their bent shape about the forming frame rim, the said clamping means comprising a segment interloclrably engaging the edge of the forming rim and devices for effecting longitudinal adjustment of the said segment.

3. In a machine for bending half circular frames for extension tables, a table, a sup porting frame that projects vertically from the table, a guide roller on the table top, a forming frame having a semi-circular rim, the said rim being ournalled on the vertical supporting frame with its rim face oppos ing the guide roller, a bending band adapted to rest flatwise on the table and to passbetween the guide roller and the rim of the forming frame, one end of the said band being fast to one edge of the forming frame and which constitutes with the said frame a for receiving the forward end of the wooden body or core to be bent, a clamp device on the aforesaid edge of the forming frame adapted to grip the said wooden body and pull it with the board betwee the frame rim and the table guide and around the forming frame rim as the said frame is rotated, means on the other edge of the forming frame for clamping the outer end of the band whereby to hold it and the wooden core to their bent shape about the forming frame rim, the said clamping means comprising a segment interloclzably engaging the edge of the forming rim, de vices for effecting longitudinal adjustment of the said segment, the inner end of the bending band passing over and fixedly connected to the inner end of the said segment.

a. In a machine for the purpose stated, the combination with a table, a supporting frame that extends v rtically from the table ana a supplemental frame cooperative with the main vertical frame and verticallyadjustable relatively to the said main vertical frame; of a forming frame rotatably mounted upon and movable vertically with the supplemental frame, said forming frame including a semi-circular forming frame, a bending band adapted to lie flatwise on the table and to receive the wooden core or body fiatwise thereon, with one end thereof adjacent one edge of the forming frame rim, means for securing the forward end of the band and for clamping the corresponding end of the core to the forming frame, means for effecting the rotation of the forming frame, whereby to pull the bending band and the, wooden core between the forming frame rim and the table and around the said rim, further means for holding the band and the core in their bent shape onto the said rim, means for efiecting rotation to the forming frame comprising a master gear, power transmission joined therewith and operative connections that join the forming frame and the master gear, the said operative connections comprising studs projected from the outer face of the master gear and locking lugs on the forming frame for interloclzably and removably engaging the said lugs whereby to provide for mounting forming frames of different diameters onto the said master V j 5. In a wood bending machineof the character described, the combination with a table, a main supportingframe, a supplemental supporting frame supported by and having vertical adjustment along the main supporting frame, a power shaft'journalled transversely on the said supplemental supporting frame, a forming frame axially ful crnmed on the said power shaft and having radial arms connecting with a semi-circular forming rim, a bending band, the said band and the forward end of the forming frame having coengaging, clamp devices for attaching the band to the rim to bend the wooden core around the said rim, the rear end of the band and the rear end of the rim having lever controlled means for clamping the band and the woooen core to.

their bent around position, means for effecting rotation of the forming frame, the

said means comprising a master gear on LEWIS PRESTON MALL.

that interlockably 

